No, pressure-enthalpy diagrams are not available for all types of refrigerants. While diagrams are widely available for common refrigerants like R-22, R-410A, and R-134a, they may not be readily available for newer or less common refrigerants. In such cases, technicians and engineers may need to rely on other sources of data, such as refrigerant property tables or online databases, to access the necessary thermodynamic properties. Alternatively, they may need to create their own diagrams using specialized software or by consulting with refrigerant manufacturers or experts in the field.